The Technical Standards and Safety Authority (TSSA) adopts standards and administers the policies, procedures and processes for the certification of welders and brazers regulated under the Technical Standards and Safety Act, 2000’s Ontario Regulation 220/01: Boilers and Pressure Vessels (BPVs). Businesses that repair/alter BPVs and install/repair associated piping systems are required to hold a Certificate of Authorization (COA) from TSSA or another Canadian jurisdiction. Companies with a National Board Certificate of Authorization (“R” stamp) are also acceptable for repairs/alterations of BPVs.
“In the following directory, you can find a listing of businesses that hold a COA issued by TSSA. Please note that the information in this directory is updated periodically and may not reflect the most recent information available for each entry. If you have a question or concern regarding any of the information contained on this page, please contact customerservices@tssa.org or call 1-877-682-TSSA (8772).”

  • Clear Results

TSSA Registered Certificate Of Authorization

  • ANMAR MECHANICAL AND ELECTRICAL CONTRACTORS LTD

    ASME A-2-Section I Boiler Assembly (SHOP & FIELD), ASME PP-2-Section I Boiler External Piping (SHOP & FIELD), ASME U-4-Sec. VIII, Div 1 Pressure Vessel Mfr. (SHOP & FIELD), CSA-B51 Fittings, Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), Alternate Piping Process

  • ANTHONY ALLEGRETTI O/A STORM MECHANICAL

    Refrigeration Piping Installation ASME B31.5 (FIELD ONLY), Medical Gas Piping Installation CSA-Z7396.1 (FIELD ONLY)

  • ANVI SERVICES LTD.

    Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD), Medical Gas Piping Installation CSA-Z7396.1 (SHOP & FIELD)

  • APOGEE CERAMICS INC.

    CSA-B51 Fittings, PRT Section IV (SHOP ONLY)

  • APPLIED CRYO TECHNOLOGIES

    Process Piping Installation ASME B31.3 (SHOP ONLY)

  • APPLIED LUBRICATION TECHNOLOGY INC

    Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), CSA-B51 Fittings

  • APPLIED SYSTEMS TECHNOLOGIES INC.

    Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD)

  • AQUATEMP MECHANICAL CONTRACTOR LIMITED

    Power Piping Installation ASME B31.1 (SHOP & FIELD)

  • ARC BOILER REPAIR (1983) LTD

    ASME PP-2-Section I Boiler External Piping (SHOP & FIELD), Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD)

  • ARCADIAN PROJECTS INC

    Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD)

  • ARCTIC COOL CHILLERS LIMITED

    CSA-B51 Fittings, Boiler & Pressure Vessel Repair/Alteration (SHOP ONLY), Refrigeration Piping Installation ASME B31.5 (SHOP ONLY)

  • ARLANXEO CANADA INC.

    Owner/User Self Inspection of Repairs, Process Piping Installation ASME B31.3 (SHOP ONLY), Refrigeration Piping Installation ASME B31.5 (SHOP ONLY), CSA-B51 Fittings, Power Piping Installation ASME B31.1 (SHOP ONLY), Boiler & Pressure Vessel Repair/Alteration (SHOP ONLY)

  • ART BLAKE REFRIGERATION LTD

    Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD)

  • ASI GROUP LTD

    Process Piping Installation ASME B31.3 (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD)

  • ASLAN TECHNOLOGIES INC

    Process Piping Installation ASME B31.3 (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD)

  • ASSOCIATE AIR MECHANICAL SYSTEMS LTD

    Refrigeration Piping Installation ASME B31.5 (SHOP AND FIELD)

  • ATS INDUSTRIAL AUTOMATION INC.

    Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD), Process Piping Installation ASME B31.3 (SHOP & FIELD), CSA-B51 Fittings, ASME U-1-Mfr. of Sec. VIII, Div 1 Pressure Vessels (SHOP ONLY), Vessels, Pumps, Valves, Piping & Containment (N with NA), Supports (NS) (Can be added to N/NPT/NA), CSA-N285.0 Nuclear Fittings (SHOP ONLY), CSA-N285.0 Nuclear Item Repair, Modification or Replacement (FIELD ONLY)

  • AUTOMATIC BOILER & REGULATORS LIMITED

    Boiler & Pressure Vessel Repair/Alteration (SHOP & FIELD), Power Piping Installation ASME B31.1 (SHOP & FIELD)

  • AWC MANUFACTURING LP

    ASME U-1-Mfr. of Sec. VIII, Div 1 Pressure Vessels (SHOP ONLY), CSA-B51 Fittings, Boiler & Pressure Vessel Repair/Alteration (SHOP ONLY)